<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>USedJavaScriptinReact</title>
    <script src="https://cdn.bootcss.com/react/16.4.0/umd/react.development.js"></script>
    <script src="https://cdn.bootcss.com/react-dom/16.4.0/umd/react-dom.development.js"></script>
    <script src="https://cdn.bootcss.com/babel-standalone/6.26.0/babel.min.js"></script>
</head>
<body>
<div id="example"></div>
<script type="text/babel">
    ReactDOM.render(
        <div>
            <h1>
                {1+1}
            </h1>
        </div>,
        document.getElementById('example')
    );
</script>
</body>
</html>